Recumbent exercise bike



FIG. 1 is a perspective view of a recumbent exercise bike, taken from the top and right side, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a recumbent exercise bike, as shown. 